I did a fresh import and all of the avatars are missing. Sidekiq still has 13M things to process, but I don’t see how that could be the problem. I did another import on another site with what I believe to be the same import script and the avatars are fine there.
created_at: Thu, 19 Apr 2018 23:51:15 UTC +00:00,
updated_at: Thu, 19 Apr 2018 23:51:15 UTC +00:00,
But that file isn’t in uploads (or tombstone).
I looked at Avatars not showing after import and that didn’t seem to be related.